No one has mentioned this one. Is Red Line still Group V (polyol ester)?
It never was. It just has a good slug of POE in the base oil blend (which is PAO), more than Mobil uses in their 0w-40 for example, which also has POE in it.No one has mentioned this one. Is Red Line still Group V (polyol ester)?
Actually, sometimes they are. On the newest version of the Pentastar, for example, they tightened the diameter of oil journals in the head. I am told they were going with 0w20 from the outset and they did all of the development and durability testing with 0w20.I don't think engines are ever designed for a certain weight oil. Too many variables.
Yes an engine can incorporate design changes that will help it tolerate thinner oils but none of those changes will preclude the use of thicker ones.Actually, sometimes they are. On the newest version of the Pentastar, for example, they tightened the diameter of oil journals in the head. I am told they were going with 0w20 from the outset and they did all of the development and durability testing with 0w20.
So they made the passages more narrow so it can tolerate thinner oils? Please help me make sense of that.Yes an engine can incorporate design changes that will help it tolerate thinner oils but none of those changes will preclude the use of thicker ones.
Tighter/wider bearings are indeed more tolerant of thinner lubes. That was the risk with going below 0w-16 and why Honda had to do the bottom-end redesign on engines that were spec'ing 0w-12, the bearings weren't sufficiently wide to allow the use of oil that thin (provide adequate MOFT).So they made the passages more narrow so it can tolerate thinner oils? Please help me make sense of that.
I was talking passage or oil journal width/diameter, not bearing width. Maybe I didn't state it clearly originally. The newer gen Pentastar has smaller diameter oil journals. They designed this engine with 0w20 in mind.Tighter/wider bearings are indeed more tolerant of thinner lubes. That was the risk with going below 0w-16 and why Honda had to do the bottom-end redesign on engines that were spec'ing 0w-12, the bearings weren't sufficiently wide to allow the use of oil that thin (provide adequate MOFT).
Yes, when you said journals, I assumed you meant bearing journals in the heads.I was talking passage or oil journal width/diameter, not bearing width. Maybe I didn't state it clearly originally. The newer gen Pentastar has smaller diameter oil journals. They designed this engine with 0w20 in mind.
Nope, sorry for the confusion. I meant the passages through which oil circulates. Journals was the wrong word.Yes, when you said journals, I assumed you meant bearing journals in the heads.
Yes, that's correct.I believe galleries is the correct term here.
Thank you! That's what I was looking for! (Getting old is for the birds!)I believe galleries is the correct term here.
Yes but it beats the option!Thank you! That's what I was looking for! (Getting old is for the birds!)
Yet my 2022 RAM 1500 3.6 "recommends" 5W20 OR 5W30 "if" 5W20 isn't available.Actually, sometimes they are. On the newest version of the Pentastar, for example, they tightened the diameter of oil journals in the head. I am told they were going with 0w20 from the outset and they did all of the development and durability testing with 0w20.
Your owner's manual does not say that.Yet my 2022 RAM 1500 3.6 "recommends" 5W20 OR 5W30 "if" 5W20 isn't available.
"My" 2022 RAM 1500 "CLASSIC" owners manual says this from page 341.Your owner's manual does not say that.
From page 473 of your 2022 RAM Owners Manual: "We recommend using Mopar 0w20 Full Synthetic Engine Oil which meets the requirements of the manufacturer material standard MS6395. Equivalent SAE 0w20 engine oil can be used, but must have the API Starburst trademark."
You may have misinterpreted this on page 409, which is not the recommendation page, but rather describes the API symbols.
"American Petroleum Institute (API) Approved Engine Oil These symbols mean that the oil has been certified by the API. The manufacturer only recommends API trademark oils. The API Starburst trademark certifies 0W-20, 5w20, and 5W-30 engine oils. The API Donut trademark certifies 0W-40 and 5W-40 engine oil."
Page 473 is where the actual recommendation is for your engine as well as the 5.7. 0w20 is the only oil mentioned. In fact, from what I've seen, everywhere else in the world where this version of the Pentastar is sold, the manuals recommend only 0w20.
Folks that can't win, will often toss out a consenting Nik name.kiddo